par Haidt, Dieter;Stein, Josef;Natali, Sergio;Piscitelli, G.;Romano, Francesco;Fett, E.;Lemonne, Jacques 
;Pedersen, Turid T.I.;Tovey, Stuart;Brisson, Violette;Petiau, P.;Esveld, C.D. C.D.;Timmermans, Johan ;Aubert, B.;Chounet, L.M.;Le Dong, F.;Bobisut, H.;Huzita, F.;Sconza, Alberta;Marzari-Chiesa, Albert A.E.;Werbrouck,
Référence Physical Review D - Particles, Fields, Gravitation and Cosmology, 3, 1, page (10-37)
Publication Publié, 1971
;Pedersen, Turid T.I.;Tovey, Stuart;Brisson, Violette;Petiau, P.;Esveld, C.D. C.D.;Timmermans, Johan ;Aubert, B.;Chounet, L.M.;Le Dong, F.;Bobisut, H.;Huzita, F.;Sconza, Alberta;Marzari-Chiesa, Albert A.E.;Werbrouck, Référence Physical Review D - Particles, Fields, Gravitation and Cosmology, 3, 1, page (10-37)
Publication Publié, 1971
Article révisé par les pairs
| Résumé : | A sample of K+ mesons stopped in the CERN 1.1-m3 heavy-liquid bubble chamber has been used to study the Dalitz-plot density and the μ+ polarization in Kμ3+ decay and to measure the Kμ3+ and Ke3+ branching ratios. All three analyses are described in detail, and they are used, separately and combined, to study the form of the strangeness-changing, semileptonic weak interaction. This is found to be consistent with a coupling of vector currents and to be invariant under time reversal. The vector form factors are studied with a wide range of assumptions as to their possible four-momentum (q2) dependence, and the results of all three measurements are in agreement. If λ+ is fixed at 0.029 (the average value from Ke3+ experiments) and if ξ is assumed to be independent of q2, then the result is ξ=-0.65±0.13. Assuming that f+(q2) and ξ(q2) are both linear functions of q2, a three-parameter fit gives λ+=0.060±0.019, ξ(0)=-1.0±0.5, and ξ(5.1mπ2)=-0.97±0.20. © 1971 The American Physical Society. |
